My business deals in dollars, not dirhams — which currency does the tax return use?

Regardless of the currency your books are kept in (US dollars, say, if most of your clients or suppliers are outside the country), the Corporate Tax return must be filed in UAE dirhams. If your books run in another currency, the figures need to be converted to dirhams using a documented, consistent exchange rate — typically the central bank rate on a specified date, applied either per transaction or per period, depending on the policy adopted.

The issue isn't the conversion itself — it's inconsistency. Switching the conversion method every period to whatever's convenient undermines the return's credibility with the authority. RASEEKH sets a clear currency conversion policy for your file from the first tax period, and keeps it consistent every year after.